322-8714 Fahrantrieb für Caterpillar 323EL 320D2 Midibagger

323EL 320D2 Final Drive for CAT Excavator spare parts 322‑8714 3228714 333-2988 3332988 Axial Piston Motor Aftermarket

Product Overview

The Caterpillar 323EL and 320D2 are two of the most common mid‑size excavators on modern job sites — 20‑to‑23‑ton machines that move earth, dig trenches and load trucks across infrastructure and urban projects. The axial piston motor and planetary reducer under each track, covered by references 322‑8714 and 3228714,333-2988 3332988, is what keeps them moving: turning hydraulic flow into the slow, powerful rotation pulling the machines across site. On a mid‑size CAT worked hard, drive wear accumulates in quiet stages first. One track lags, the machine drifts on level ground, the drive housing warms faster than its opposite, and a note from the track motor gradually deepens. Running on past that point scores the piston group and reduction gears further. This aftermarket drive reproduces the original motor‑and‑reducer pairing as one sealed, tested unit, covering both the 323EL and 320D2, so the worn assembly comes off and the new one bolts straight back on.

Core Advantages

1. One reference covers two common CAT models
Because this drive fits both the 323EL and 320D2, workshops maintaining modern CAT fleets can stock a single unit and cover both machines. That simplifies parts planning and shortens turnaround when a drive fails.

2. Pressure‑tight motor internals for even track pull
The piston, cylinder block and valve plate are finished to close clearances so the motor holds its pressure rather than leaking internally. Both tracks then push the same — no tug to one side, no wandering, no hesitation when the bucket digs in.

3. Hardened reduction gears for mid‑size duty
The planetary gear set is case‑hardened and precision‑cut with controlled backlash. Meshing stays smooth and quiet, the drive torque spreads across the teeth, and wear from years of track push and ramp climbing slows right down.

4. One matched, tested unit for a clean swap
Motor and reducer arrive pre‑assembled and bench‑checked, so the fitter removes the old drive and bolts on the new one without sourcing separate components. No mid‑job mismatches, no second visit to chase a leak.

5. Aftermarket value for a working CAT fleet
An original Caterpillar final drive exchange carries a premium price. This aftermarket unit delivers dependable output at a fraction of the cost, with sample and batch supply for workshops keeping several of these machines on the books.

Manufacturing & Quality Control

Each drive is built under controlled conditions: incoming material verification, precision machining of housings and gears, case hardening of wear surfaces and clean assembly. Before packing, every unit runs on a test bench to check output torque, internal leakage and running noise, and only passing assemblies are released. Preservation oil, moisture sealing and shock‑absorbing crating protect the assembly through long‑distance freight.

Frequently Asked Questions

Q1: Does this drive fit both the 323EL and 320D2?
A: The reference is shared across both models, but build variants can occur. Please share your machine model and serial number so we confirm the correct unit before dispatch.

Q2: Is this the complete motor and reducer?
A: Yes — the listing covers the full axial piston motor and planetary reducer as one assembly, ready to bolt on. Separate components can be checked on request.

Q3: What faults point to drive wear?
A: Uneven track speed, drifting on flat ground, a hot or noisy track motor and tracks that fail to pull under load. Inspect before contamination spreads through the travel circuit.

Q4: What is the warranty position?
A: Manufacturing and material defects are covered. Damage from contaminated oil, debris in the motor, track obstruction, overload or incorrect installation is excluded; follow the Caterpillar service manual for fitting and bleeding.